Everybody at these things thinks they know what to do. Most of them don’t. Take all the advice you get with a whopping pile of salt. If it sounds wrong or dangerous it probably is.
One more thing: DON’T LET ANYBODY MODIFY YOUR BIKE. Do NOT let anybody touch your suspension. If there’re guys providing track-side support (i.e., vendors who come to the track to sell tires/services/etc.), find the one that all the local racers use and let him work on your bike.